Reviews — Geological Survey, Western Australia. 667 



of doubtfal affinities ; Ci/rtocerns Qnebecensis, Wiiiteaves, from the 

 Levis Formation of Quebec; Steganohlastus Oltawaensis, Whiteaves, 

 Matheria brevis, Whiteaves, and Spyrocerns Beauportense, Whiteaves, 

 from the Trenton Limestone of Quebec and Ontario. 



8. This list chiefly concerns the nomenclature of the species, 

 which has been brought up to date, but it also includes changes 

 made in the identification of the species based on the reconsideration 

 of their supposed affinities in the light of new or more ample 

 material. Dr. Whiteaves adds important observations on some of 

 the species from his own rich stores of knowledge, and Dr. E. 0. 

 Ulrich also contributes valuable criticisms on some of the species 

 that were submitted to him. The groups dealt with belong to the 

 Anthozoa, Hydroraedusse, Brachiopoda, and MoUusca. 



An appendix containing errata to parts 1-3 of the volume, and 

 an index to the generic and specific names in the whole volume, 

 complete the work. A. H. F. 



V. — Geological Survey : Western Australia. Bulletin No. 22 : 

 The Auriferous Deposits and Mines of Menzies, North 

 CooLGAKDiE GoLDFiELD. By Harry P. WooDWARD, Assistant 

 Government Geologist, 8vo ; pp. 1-92, with two maps and 

 six plates of sections, (Perth, W.A., 1906.) 



rpHIS excellent report upon the important gold-mining district of 

 JL Menzies forms part of a series treating of different mining 

 centres of the State. 



The geological work is based upon Mr, W. D. Campbell's 

 topographical map pi-epared in the year 1899. The area embraced 

 by the report covers about 50 square miles, and includes the 

 productive part of the district so far as it has been investigated. 



In its salient geological features Menzies consists of a complex of 

 basic rocks with intrusive acidic dykes which were most probably 

 derived from the large granitic mass forming the higher ground in 

 the vicinity of Springfield, near the eastern border of the map. 

 A covering of superficial deposits has rendered geological mapping 

 difficult, but the different rock masses have been delineated as 

 accurately as the scale of the field plans would admit of. 



The basic crystalline rocks are of much importance owing to their 

 intimate connection with the auriferous quartz reefs of the district. 

 They consist mostly of amphiboliteanddiorite, with their derivatives — 

 serpentine, chlorite, and hornblende schists. 



The acidic rocks occupy only a relatively limited area of the 

 surface in the vicinity of Springfield, though their presence to the 

 north and west has been proved in wells and quarries. They 

 consist of gneiss, mica schist, and sericite schist, and, as is the case 

 with the basic rocks, the schistose character seems to be lost at 

 a variable depth below the surface. A portion of the field is 

 traversed by numerous acidic dykes, generally represented by sericite 

 schists and allied rocks, with transitions to porphyritic granite. 



The quartz reefs, which are confined to the greenstones, are of 



